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Portland Hills Fault using data from USGS and OpenStreetMap. Made using QGIS. The Portland Hills fault zone is the largest shallow fault that cuts beneath Portland, Oregon. [1] It stretches from Oregon City to Scappoose, and has a zone of deformation that extends at least 1,300 feet (400 m). [2]
From the north these are (see the map at right): Devils Mountain Fault zone (including Strawberry Point and Utsalady Point faults) ∪ Everett Basin. Southern Whidbey Island Fault (SWIF) ∩ "Uplift of unknown origin" (Port Ludlow) Kingston arch (Lofall Fault [22]) ∪ Seattle Basin. Seattle Fault zone (approx. lines E-F) ∩ Seattle Uplift
The Portland/Vancouver Basin ecoregion (named for the cities of Portland and Vancouver) is a geological depression at the base of the Portland Hills fault-block. It contains the confluence of the Willamette and Columbia Rivers and is composed of deltaic sands and gravels deposited by Pleistocene floods, notably the Missoula Floods. Elevation ...
A fault off the Pacific coast could devastate Washington, Oregon and Northern California with a major earthquake and tsunami. Researchers mapped it comprehensively for the first time.
Port Hills Fault: South Island, New Zealand: Oblique-thrust: Active: 2011 Christchurch (M6.3) Puente Hills Thrust: 40: San Gabriel Valley, United States: Blind thrust: Active: 1987 Whittier Narrows (M5.9) Queen Charlotte-Fairweather Fault: 800: Canada and Alaska: Dextral: Active: 1949 Graham Island (M8.1), 1958 Lituya Bay (M7.8), 2012 Haida ...
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Among them are the Portland Hills Fault on the city's west side, [78] and the East Bank Fault on the east side. [79] According to a 2017 survey, several of these faults were characterized as "probably more of a hazard" than the Cascadia subduction zone due to their proximities to population centers, with the potential of producing magnitude 7 ...
The Puente Hills thrust fault system is in a broad zone directly underneath the densest parts of the L.A ... A circle on a map shows the location of Monday's 4.4. magnitude quake quake in Los ...